help@askiitians.com

+91-87964 74404

Grade 12th passElectric Current

In L–C–R series AC circuit voltage amplitude across L, C and R are 10V, 6Vand 3V respectively. At an instant voltage across the resistance is 3√3 /2 volt and source voltage is decreasing then what can we say about the current in the circuit at that instant.(increasing or decreasing) explain

suraj

10 Years agoGrade 12th pass

1 Answer

Vikas TU

10 Years ago

Current in the L-C-R circuit,

i = Vsource/Znet = > (10 + 6 + 3)/root((wl)^2 + (1/wc)^2 + R^2) = > 19/root((wl)^2 + (1/wc)^2 + R^2)

i’ = Vsource/Znet => (10 + 6 + 3root3/2)/Znet = >(16 + 3root3/2)/root((wl)^2 + (1/wc)^2 + R^2)

=> 18.59/root((wl)^2 + (1/wc)^2 + R^2)

Thus source voltage decreases and net impedence reamins same.

the current in circuit will too decrease.

as it is directly proprotional to vilatage source.

The fig. Shows a network of resistance in which the point A is earthed

electric current

0 Answer Available

Last Activity: 4 Years ago

When a p.d of 2v is applied across a resistor, 10j of energy are covered. What charge flows through the resistor?

electric current

0 Answer Available

Last Activity: 4 Years ago

Please provide it's solution. In video form
Find the equivalent resistance of the given figure

electric current

1 Answer Available

Last Activity: 4 Years ago

The resistivity of material is 10 ohm m at 30 C when the temperature drops to 28 then the resistivity drops by 2. The temperature coefficient of resistivity of material is

electric current

1 Answer Available

Last Activity: 4 Years ago

Three cells of 2.0v each and internal resistance of 1.0 each are connected in series and in parallel calculate the new emf and new internal resistance in each connection

electric current

1 Answer Available

Last Activity: 4 Years ago

View all Questions